CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Net sales
Building products	$ 645,954	$ 572,120
Construction services	188,248	185,580
Net sales	834,202	757,700
Cost of sales
Building products	480,301	426,083
Construction services	154,817	153,420
Cost of sales	635,118	579,503
Gross profit	199,084	178,197
Selling, general and administrative expenses	160,204	148,888
Depreciation expense	9,506	10,561
Amortization expense	3,657	3,821
Merger and integration costs	1,687	4,441
Total operating expenses	175,054	167,711
Income from operations	24,030	10,486
Other income (expense)
Interest expense	(5,982)	(6,088)
Other income, net	1,950	319
Income before income taxes	19,998	4,717
Income tax expense	4,639	973
Net income	$ 15,359	$ 3,744
Weighted average common shares outstanding
Basic (in shares)	67,138	66,692
Diluted (in shares)	67,664	67,186
Net income per common share
Basic (in dollars per share)	$ 0.23	$ 0.06
Diluted (in dollars per share)	$ 0.23	$ 0.06